Cisco Catalyst 3750-E Series Manuale utente

Americas Headquarters

Cisco Systems, Inc.

170 West Tasman Drive

San Jose, CA 95134-1706

USA

http://www.cisco.com

Tel: 408 526-4000

800 553-NETS (6387)

Fax: 408 527-0883

Catalyst 3750-E and 3560-E Switch

Software Configuration Guide

Cisco IOS Release 12.2(55)SE

August 2010

Text Part Number: OL-9775-08

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL

STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT

WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT

SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE

OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH

ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT

LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF

DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING,

WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO

OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at

www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership

relationship between Cisco and any other company. (1005R)

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the

document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

iii

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

CONTENTS

Preface xlix

Audience xlix

Purpose xlix

Conventions xlix

Related Publications l

Obtaining Documentation and Submitting a Service Request li

CHAPTER

1Overview 1-1

Features 1-1

Deployment Features 1-2

Performance Features 1-4

Management Options 1-5

Manageability Features 1-6

Availability and Redundancy Features 1-8

VLAN Features 1-9

Security Features 1-9

QoS and CoS Features 1-12

Layer 3 Features 1-14

Power over Ethernet Features 1-15

Monitoring Features 1-15

Default Settings After Initial Switch Configuration 1-16

Network Configuration Examples 1-19

Design Concepts for Using the Switch 1-19

Small to Medium-Sized Network Using Catalyst 3750-E and 3560-E Switches 1-26

Large Network Using Catalyst 3750-E and 3560-E Switches 1-28

Multidwelling Network Using Catalyst 3750-E Switches 1-31

Long-Distance, High-Bandwidth Transport Configuration 1-32

Where to Go Next 1-33

CHAPTER

2Using the Command-Line Interface 2-1

Understanding Command Modes 2-1

Understanding the Help System 2-3

Understanding Abbreviated Commands 2-3

Contents

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Understanding no and default Forms of Commands 2-4

Understanding CLI Error Messages 2-4

Using Configuration Logging 2-4

Using Command History 2-5

Changing the Command History Buffer Size 2-5

Recalling Commands 2-6

Disabling the Command History Feature 2-6

Using Editing Features 2-6

Enabling and Disabling Editing Features 2-6

Editing Commands through Keystrokes 2-7

Editing Command Lines that Wrap 2-8

Searching and Filtering Output of show and more Commands 2-9

Accessing the CLI 2-9

Accessing the CLI through a Console Connection or through Telnet 2-10

CHAPTER

3Assigning the Switch IP Address and Default Gateway 3-1

Understanding the Boot Process 3-1

Assigning Switch Information 3-2

Default Switch Information 3-3

Understanding DHCP-Based Autoconfiguration 3-3

DHCP Client Request Process 3-4

Understanding DHCP-based Autoconfiguration and Image Update 3-5

DHCP Autoconfiguration 3-5

DHCP Auto-Image Update 3-5

Limitations and Restrictions 3-6

Configuring DHCP-Based Autoconfiguration 3-6

DHCP Server Configuration Guidelines 3-7

Configuring the TFTP Server 3-7

Configuring the DNS 3-8

Configuring the Relay Device 3-8

Obtaining Configuration Files 3-9

Example Configuration 3-10

Configuring the DHCP Auto Configuration and Image Update Features 3-11

Configuring DHCP Autoconfiguration (Only Configuration File) 3-11

Configuring DHCP Auto-Image Update (Configuration File and Image) 3-12

Configuring the Client 3-14

Manually Assigning IP Information 3-15

Checking and Saving the Running Configuration 3-16

Configuring the NVRAM Buffer Size 3-17

Contents

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Modifying the Startup Configuration 3-18

Default Boot Configuration 3-18

Automatically Downloading a Configuration File 3-18

Specifying the Filename to Read and Write the System Configuration 3-19

Booting Manually 3-19

Booting a Specific Software Image 3-20

Controlling Environment Variables 3-21

Scheduling a Reload of the Software Image 3-24

Configuring a Scheduled Reload 3-24

Displaying Scheduled Reload Information 3-25

CHAPTER

4Configuring Cisco IOS Configuration Engine 4-1

Understanding Cisco Configuration Engine Software 4-1

Configuration Service 4-2

Event Service 4-3

NameSpace Mapper 4-3

What You Should Know About the CNS IDs and Device Hostnames 4-3

ConfigID 4-3

DeviceID 4-4

Hostname and DeviceID 4-4

Using Hostname, DeviceID, and ConfigID 4-4

Understanding Cisco IOS Agents 4-5

Initial Configuration 4-5

Incremental (Partial) Configuration 4-6

Synchronized Configuration 4-6

Configuring Cisco IOS Agents 4-6

Enabling Automated CNS Configuration 4-6

Enabling the CNS Event Agent 4-8

Enabling the Cisco IOS CNS Agent 4-9

Enabling an Initial Configuration 4-9

Enabling a Partial Configuration 4-13

Displaying CNS Configuration 4-14

CHAPTER

5Managing Switch Stacks 5-1

Understanding Switch Stacks 5-1

Switch Stack Membership 5-3

Stack Master Election and Re-Election 5-5

Switch Stack Bridge ID and Router MAC Address 5-7

Stack Member Numbers 5-7

Contents

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Stack Member Priority Values 5-8

Switch Stack Offline Configuration 5-8

Effects of Adding a Provisioned Switch to a Switch Stack 5-8

Effects of Replacing a Provisioned Switch in a Switch Stack 5-10

Effects of Removing a Provisioned Switch from a Switch Stack 5-10

Hardware Compatibility and SDM Mismatch Mode in Switch Stacks 5-10

Switch Stack Software Compatibility Recommendations 5-11

Stack Protocol Version Compatibility 5-11

Major Version Number Incompatibility Among Switches 5-11

Minor Version Number Incompatibility Among Switches 5-11

Understanding Auto-Upgrade and Auto-Advise 5-12

Auto-Upgrade and Auto-Advise Example Messages 5-13

Incompatible Software and Stack Member Image Upgrades 5-15

Switch Stack Configuration Files 5-15

Additional Considerations for System-Wide Configuration on Switch Stacks 5-16

Switch Stack Management Connectivity 5-16

Connectivity to the Switch Stack Through an IP Address 5-17

Connectivity to the Switch Stack Through an SSH Session 5-17

Connectivity to the Switch Stack Through Console Ports or Ethernet Management Ports 5-17

Connectivity to Specific Stack Members 5-18

Switch Stack Configuration Scenarios 5-18

Configuring the Switch Stack 5-20

Default Switch Stack Configuration 5-20

Enabling Persistent MAC Address 5-20

Assigning Stack Member Information 5-22

Assigning a Stack Member Number 5-22

Setting the Stack Member Priority Value 5-23

Provisioning a New Member for a Switch Stack 5-23

Accessing the CLI of a Specific Stack Member 5-25

Displaying Switch Stack Information 5-25

Troubleshooting Stacks 5-25

Manually Disabling a Stack Port 5-26

Re-Enabling a Stack Port While Another Member Starts 5-26

Understanding the show switch stack-ports summary Output 5-27

Identifying Loopback Problems 5-28

Software Loopback 5-28

Software Loopback Example: No Connected Stack Cable 5-29

Software Loopback Examples: Connected Stack Cables 5-29

Hardware Loopback 5-30

Contents

vii

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Hardware Loopback Example: LINK OK event 5-30

Hardware Loop Example: LINK NOT OK Event 5-31

Finding a Disconnected Stack Cable 5-32

Fixing a Bad Connection Between Stack Ports 5-33

CHAPTER

6Clustering Switches 6-1

Understanding Switch Clusters 6-2

Cluster Command Switch Characteristics 6-3

Standby Cluster Command Switch Characteristics 6-3

Candidate Switch and Cluster Member Switch Characteristics 6-4

Planning a Switch Cluster 6-4

Automatic Discovery of Cluster Candidates and Members 6-5

Discovery Through CDP Hops 6-5

Discovery Through Non-CDP-Capable and Noncluster-Capable Devices 6-6

Discovery Through Different VLANs 6-7

Discovery Through Different Management VLANs 6-7

Discovery Through Routed Ports 6-8

Discovery of Newly Installed Switches 6-9

HSRP and Standby Cluster Command Switches 6-10

Virtual IP Addresses 6-11

Other Considerations for Cluster Standby Groups 6-11

Automatic Recovery of Cluster Configuration 6-12

IP Addresses 6-13

Hostnames 6-13

Passwords 6-14

SNMP Community Strings 6-14

Switch Clusters and Switch Stacks 6-14

TACACS+ and RADIUS 6-16

LRE Profiles 6-16

Using the CLI to Manage Switch Clusters 6-16

Catalyst 1900 and Catalyst 2820 CLI Considerations 6-17

Using SNMP to Manage Switch Clusters 6-17

CHAPTER

7Administering the Switch 7-1

Managing the System Time and Date 7-1

Understanding the System Clock 7-2

Understanding Network Time Protocol 7-2

Configuring NTP 7-4

Default NTP Configuration 7-4

Contents

viii

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

Configuring NTP Authentication 7-4

Configuring NTP Associations 7-5

Configuring NTP Broadcast Service 7-6

Configuring NTP Access Restrictions 7-8

Configuring the Source IP Address for NTP Packets 7-10

Displaying the NTP Configuration 7-11

Configuring Time and Date Manually 7-11

Setting the System Clock 7-11

Displaying the Time and Date Configuration 7-12

Configuring the Time Zone 7-12

Configuring Summer Time (Daylight Saving Time) 7-13

Configuring a System Name and Prompt 7-14

Default System Name and Prompt Configuration 7-15

Configuring a System Name 7-15

Understanding DNS 7-15

Default DNS Configuration 7-16

Setting Up DNS 7-16

Displaying the DNS Configuration 7-17

Creating a Banner 7-17

Default Banner Configuration 7-17

Configuring a Message-of-the-Day Login Banner 7-18

Configuring a Login Banner 7-19

Managing the MAC Address Table 7-19

Building the Address Table 7-20

MAC Addresses and VLANs 7-20

MAC Addresses and Switch Stacks 7-21

Default MAC Address Table Configuration 7-21

Changing the Address Aging Time 7-21

Removing Dynamic Address Entries 7-22

Configuring MAC Address Change Notification Traps 7-22

Configuring MAC Address Move Notification Traps 7-24

Configuring MAC Threshold Notification Traps 7-25

Adding and Removing Static Address Entries 7-27

Configuring Unicast MAC Address Filtering 7-28

Disabling MAC Address Learning on a VLAN 7-29

Displaying Address Table Entries 7-30

Managing the ARP Table 7-31

Contents

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

CHAPTER

8Configuring SDM Templates 8-1

Understanding the SDM Templates 8-1

Dual IPv4 and IPv6 SDM Templates 8-2

SDM Templates and Switch Stacks 8-3

Configuring the Switch SDM Template 8-4

Default SDM Template 8-4

SDM Template Configuration Guidelines 8-4

Setting the SDM Template 8-5

Displaying the SDM Templates 8-6

CHAPTER

9Configuring Switch-Based Authentication 9-1

Preventing Unauthorized Access to Your Switch 9-1

Protecting Access to Privileged EXEC Commands 9-2

Default Password and Privilege Level Configuration 9-2

Setting or Changing a Static Enable Password 9-3

Protecting Enable and Enable Secret Passwords with Encryption 9-3

Disabling Password Recovery 9-5

Setting a Telnet Password for a Terminal Line 9-6

Configuring Username and Password Pairs 9-6

Configuring Multiple Privilege Levels 9-7

Setting the Privilege Level for a Command 9-8

Changing the Default Privilege Level for Lines 9-9

Logging into and Exiting a Privilege Level 9-9

Controlling Switch Access with TACACS+ 9-10

Understanding TACACS+ 9-10

TACACS+ Operation 9-12

Configuring TACACS+ 9-12

Default TACACS+ Configuration 9-13

Identifying the TACACS+ Server Host and Setting the Authentication Key 9-13

Configuring TACACS+ Login Authentication 9-14

Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 9-16

Starting TACACS+ Accounting 9-17

Displaying the TACACS+ Configuration 9-17

Controlling Switch Access with RADIUS 9-17

Understanding RADIUS 9-18

RADIUS Operation 9-19

RADIUS Change of Authorization 9-19

Change-of-Authorization Requests 9-20

CoA Request Response Code 9-21

Contents

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-08

CoA Request Commands 9-23

Stacking Guidelines for Session Termination 9-25

Configuring RADIUS 9-26

Default RADIUS Configuration 9-27

Identifying the RADIUS Server Host 9-27

Configuring RADIUS Login Authentication 9-29

Defining AAA Server Groups 9-31

Configuring RADIUS Authorization for User Privileged Access and Network Services 9-33

Starting RADIUS Accounting 9-34

Establishing a Session with a Router if the AAA Server is Unreachable 9-34

Configuring Settings for All RADIUS Servers 9-35

Configuring the Switch to Use Vendor-Specific RADIUS Attributes 9-35

Configuring the Switch for Vendor-Proprietary RADIUS Server Communication 9-37

Configuring CoA on the Switch 9-38

Monitoring and Troubleshooting CoA Functionality 9-39

Configuring RADIUS Server Load Balancing 9-39

Displaying the RADIUS Configuration 9-39

Controlling Switch Access with Kerberos 9-39

Understanding Kerberos 9-40

Kerberos Operation 9-42

Authenticating to a Boundary Switch 9-42

Obtaining a TGT from a KDC 9-42

Authenticating to Network Services 9-42

Configuring Kerberos 9-43

Configuring the Switch for Local Authentication and Authorization 9-43

Configuring the Switch for Secure Shell 9-45

Understanding SSH 9-45

SSH Servers, Integrated Clients, and Supported Versions 9-45

Limitations 9-46

Configuring SSH 9-46

Configuration Guidelines 9-46

Setting Up the Switch to Run SSH 9-46

Configuring the SSH Server 9-47

Displaying the SSH Configuration and Status 9-48

Configuring the Switch for Secure Socket Layer HTTP 9-49

Understanding Secure HTTP Servers and Clients 9-49

Certificate Authority Trustpoints 9-49

CipherSuites 9-51

Configuring Secure HTTP Servers and Clients 9-51

Altri manuali per Catalyst 3750-E Series

Questo manuale è adatto per i seguenti modelli

Indice

Altri manuali Cisco Interruttore

Cisco

Cisco IE-3000-8TC Manuale di installazione

Cisco

Cisco Nexus 9336C-FX2 Manuale

Cisco

Cisco Nexus 7000 Series Manuale di installazione e funzionamento

Cisco

Cisco IE3400H Guida

Cisco

Cisco Nexus 5000 Series Manuale utente

Cisco

Cisco Catalyst Express 500-24LC Manuale di istruzioni

Cisco

Cisco Catalyst 2960-XR Manuale utente

Cisco

Cisco WS-CBS3032-DEL Manuale utente

Cisco

Cisco AJ732A - MDS 9134 Fabric Switch Manuale utente

Cisco

Cisco Catalyst 2955 Series Manuale

Cisco

Cisco Catalyst IE 3 00 Series Manuale utente

Cisco

Cisco Nexus 7000 Series Manuale utente

Cisco

Cisco ME 6500 Istruzioni operative e di sicurezza

Cisco

Cisco ME 3600X-24CX Manuale utente

Cisco

Cisco HyperSwitch A100 Manuale utente

Cisco

Cisco Firepower 8120 Manuale utente

Cisco

Cisco 11154 - CSS - Switch Manuale utente

Cisco

Cisco IE 4010 Manuale

Cisco

Cisco Catalyst 6807-XL Istruzioni operative

Cisco

Cisco 4506-E - Catalyst Switch Guida all'installazione

Cisco

Cisco MDS 9000 Series Manuale utente

Cisco

Cisco MDS 9396T Manuale

Cisco

Cisco 9000 Series Manuale di istruzioni

Cisco

Cisco MS200X-24 Manuale utente

Manuali Interruttore popolari di altre marche

URC

URC Total Control MFS-8 Manuale utente

Azbil

Azbil HPQ-D11 Manuale utente

Sony

Sony DFS-900M Manuale utente

SICK

SICK i17S Manuale utente

F&F

F&F SZR-277 Manuale utente

Shure

Shure UAMS/BK Manuale utente

Dräger

Dräger X-zone Switch Off Manuale utente

Asco

Asco Joucomatic 349 Series Manuale utente

BT Mini Hub Manuale utente

D-Link

D-Link DES-1226G Manuale utente

Johnson Controls

Johnson Controls FS80-C Manuale utente

Alcatel-Lucent

Alcatel-Lucent 7450 ESS-12 Manuale utente

MicroNet

MicroNet SP1200A Manuale utente

Ruijie

Ruijie RG-PF2920 Series Manuale di installazione e funzionamento

Altinex

Altinex DA1914SX Manuale utente

MiLAN

MiLAN MIL-SM2401M Manuale utente

RJM

RJM MASTERMIND PBC/6X Manuale utente

Atlas

Atlas MMK-KVM8 Manuale utente